Rotary engine



July '26; 1927.

ROTARY ENGINE! Filed Feb. 12, 1921 3 Sheets-Sheet 1 1,636,799 Jul-y 1927' B. M. BERNTSEN 1 ROTARY ENGINE Filed Feb. 12, 1921 3 Sheets-Shut 2 INVENTOR B. M. BERNTSEN ROTARY ENGINE Filed Feb. 12, 1921 3 Sheets-Sheet 3 Earn: 25% Be/"2; 53:62?

INVENTOR W5 BY ATTO R N EY,

WITNESS:

Patented July 26, 1927.

IBERNT M. IBERNTSEN, OF BROOKLYN, NEW YORK.

ROTARY ENGINE.-

Ap'plicationfiled February 12, 1921. Serial No. 444,580.

This invention relates to rotary engines, and particularly to engines with rotary pistons and one of theprincipal objects is to produce a device of this nature. which shall be simple of construction, cheap to manufacture, and highly eflicient for the purpose for which it is designed.

Another object is to produce a device of this kind in which the rotor body and the piston carrying member rotate about respectixirla fixed axes which are arranged eccentrica y. I

Another object is to provide the rotor with improved packing/means adapted for relative sliding and canting contact with the' several pistons. 7

With these and other objects in view which will be more apparent as thespecification proceeds, the invention consists of certain novel construction and combination and arrangement of parts, the essential features of which are hereinafter fully described, are particularly pointed out in the appended claims, and are illustrated in the accompanying drawing, in which Figure 1 is a vertical sectional view of my improved engine.

Figure 2 is a vertical sectional view taken substantially on line 22 of Figure 1.

Figure 3 is a detailedp'erspective view of one of the packing members.

Figure 4 is a side elevation of the engine.

with parts broken away in section.- Like characters of reference refer to like parts in all views.

Referring to the drawing in detail, 10 represents a frame casting which may be constructed in any suitable manner to support the devices hereinafter described. This frame member 10 is provided with a space 11 in which the water or other cooling medium maycirculate. A. pipe 12 from the carburetor pierces the frame 10 for conduct-' ing fuel to the interior thereof and is provided with a valve 13 'to admit fuel twice on each revolution of the motor. The control may be of any desired well-known type for opening and closing the valve at the proper times. A way 14 is out in'the inner wall of the frame 10 adjacent to the mouth of pipe 12 so as topermit intake of the fu el during a considerable portion of the stroke of the engine.

Mountedin hearings in members 50 and 51 secured in'the frame '10 is the drive shaft 15 to which may 'be connected any system of power transmission desired. Mounted on shaft 15 to turn therewith is a gear wheel, the teeth of which-project throu h a slot 52 cut in the tubular inner end 53 0 member 50 and mesh with the teeth of an internal gear 17 formed on or fixedly secured on the inside of a tubular wall 18 of a rotatable piston carrying member mounted eccentrically of shaft 15 and comprising besides the wall 18, an outer flange or wall 19, and four piston blades 20, The wall 19 is provided with four ports 21 intermediate of the pistons 20 for permitting inflow of the. fuel to the combustion chambers defined by the pistons, and to permit the exhaust of the burnt gases and products of combustion after explosion. A collar. 54 is mounted in the inner end of member 53 and projects in to the frame 10. The member 53 also carries suitable bearings for member 18 as at 55.

A second rotary member or rotor is mounted concentric with shaft '15 and comprising a circular plate 22 and inner and outer flanges 23 and 24. The plate 22 is set into one of the inner faces of the frame 10 and-the flanges 23 and 24 extend into the the two rotating members moving about different fixed centers.

Straddling each piston 20 is a paekin member such as shown in Figure 3, forme with two curved lugs 26 connected. by a web 27 The lugs 26 of each packing member are spaced apart sufiiciently to permit of the necessary movements of the respective piston therebetween, and the sides, of the lugs facing the piston are provided with curved seats in which" are placed semi-cylindrical members 28, the flat faces of which bear against the piston so as to prevent escape of fuel etc. The packing members are spaced apart, and springs 29 tend constantly to force them apart.

An exhaust pipe is shown at and from the combustion chamber.

pierces the frame member-10, its inner end ,being situated so as to receive the exhaust from the combustion chambers. An 9,l1Xll-- forced upon the scavenging portion of the rotation. Pipe 31 is provided with a valve. 32 which may be operated by 2mg spark plug 33 of any suitable type may be inserted in the frame for effecting the necessar explosions.

In or er to facilitate the correct opening and closing of the valves 13 and 32, I provide respective cams 34 "and 35 which are fixedly mounted upon a counter-shaft 36-. A gear 37 is also'fixed to the shaft 36 and meshes with a gear 38 on the shaft 15. The

ratio of the. gears is such that the cam shaft rotates one'revolution'to two revolutions of the shaft 15. The cams operate respective valve operating means 39 and40 of any su1table constructionsuchas shown 1n Figure 4 of the drawings,

In operation, the fuel is drawn from pipe 12 into meet the combustion chambers, and as the chamber enlarges as it asses to its lowest, sition, none of this 0 arge is expelled tli ough the exhaust pipe when the port 21 comes into register with pipe 30. As the rotation roce'eds, the combustion chamber is broug t up andowing to 'the crowding action of the packing members the vol- 'ume of the combustion chamber is decreased and compression is efl'ected' The pipe 31 is closed by valve-32 at this time so that the charge is not expelled. As the port 21 passes plug33, the charge .is igmted and the piston forcedclockwise in Figure 1. As the pipe 12 is closed at this time by valve 13, the s are confined in the com ustion chamber until the pell't 21 is in register with exhaust pipe 30. esucceeding portion of the rotat on effects a compression of the remainder of the burnt gases. The valve 32 opens pipe 31 and when port 21 registers wiltllapipe 31the compressed matter is ex-.

With reference toFigure 1 of the drawings, it will be seen that the chamber #1 is 7 on the. intake stroke, chamber #2 is completing the exhaust stroke, chamber 3 is on the compression stroke, 'while cham r #4.

is at the completionof' the power stroke. In the operation of the engine, gas is being taken into the chamber'#1, and upon 0 ockwise rotation of'therotor, the gas is compressed and when brought into register with the spark plu 33,'thesame will explode 'the charge. 1e chamber #2 during this time has completed the exhaust stroke and taken in charge of gas, and will follow the same operation as the chamber #1 thus causing two successive;- explosions in the respective -chambers'#1 and #2 upon the first revolution fromthe point shown. It will understood that chamber #3 which is shown on the compression stroke hasfired of the rotor.

chamber #4. will be the next to fire' and while #4 is firing #3 is on the intake stroke, thereby establishing a fining order of-chambers 1, 2, 4 and 3 011 every two While I have shown the engine .as c onstructed for. use with gasoline, it is obvious that the engine is capable of operation by steam. f

revolutions I While I have described what I deem to be the most desirable embodiment 'of my in tails may be varied without'in any way departing from the spirit of my invention, and

vention limited only by the appended claims.

What is claimed asnew is 1. In a device of the class described, theso vention, it is obvious that many of the decombination with the framework thereof, of

a rotatable member comprising a plurality of fixedly mountedlradiating pistons, a second rotatable member m unted' eccentrical ly of the first said rotatable member and comprising flanges loosely embracing said pistons, and a plurality of packing membersyieldingly mounted in the second rotatable member and confined between the flanges thereof and slidably engaging said 2. In a device of the class described, the

pistons.

combination with the framework thereof, of

a rotatable member comprising aplurality of fixedly, mounted radiating pistons, a second rotatable member mounted eccentrically of the first said rotatable member and comprlsmg flanges loosely embracing said pistons, a plurality of packing members yieldlngly mounted in the second rotatable member and confined between the flanges thereof and each embracing a respective one of said pistons, and semi-cylindrical members mounted in said packing'members and slidably engaging said pistons.

3 In a device of the class described, the

.combination with the framework thereof, of

a rotatable member comprising a plurality of fixedly mounted radiating pistons, a second rotatable member mounted eccentrically of the first said rotatable member and comprising flanges loosely embracing Sflld'PlS. tons,'a plurality of packing members mount ed in the second rotatable member and con fined between the flanges thereof. and each embracing a. respective one of said pistons, sprmgs arranged between adjacent ends of said packing members, and semi-cylindrical members mounted in said packing members and slidably engaging said pistons.

4. In a device of the class described, the

rtary combinationof frame, a shaft rotatably mounted in'said frame, a gear fixedly mounted on said shaft, a cylindrical member enclosin said shaft and mounted .110 ro- 6 tate eccentrically of said shaft, an internal I gear fixedly secured in said cylindrical memher and meshin with the first said gear, piston blades ra 'ating' from said cylindrical member and defining. combustion cham-' them, an outer cylindrical member secured to the outer 'ends of said piston blades and provided with ports intermediate said piston blades, and a second r0- member'mounted concentric with said shaft andprov'ided with means for varying r the volume of said combustion chambers for effecting intake, compression and scaveng ingi, said means including a plurality of packing members, and springs between the .20 adjacent ends-of said membersto. force the same in a direction toward its adjacent piston blade. i

5. In a device of the class described, the

' combination of the main frame, a shaft rotatably mounted in said frame, agear fixed- 1y mounted on said shaft, a cylindrical member enclosing said shaft and mounted to ro- .tate eccentrically of said shaft, an internal packing members, and springs between. the 1 adjacent ends of said members to force the same in a direction towards its adjacent iston blade, and a feed pipe and a plurality of exhaust pipes extending through said main frame and positioned to register with the ports in the second said cylindrical memher, said exhaust pi es being effective one after the other to e ect more perfect scav- 50 whereof I have aflixed my BERNT M. BEBiITsEN.

'enging.

In testimony signature. 

